Organization of vertebrate nervous system

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Does the sympathetic system contain interneurons and are all interneurons considered to be part of the CNS (if they are I don't get the prototypical diagram of the nervous system divisions)?

 

[Thirteeen]

Does the sympathetic system contain interneurons and are all interneurons considered to be part of the CNS (if they are I don't get the prototypical diagram of the nervous system divisions)?

Interneurons lie between motor and sensory neurons in the neural pathways and shuttle signals through the CNS pathways where integration is required. Most interneurons are confined within the CNS.

The sympathetic division of the ANS has nerve fibers that branch off from the thoracic and lumbar regions of the spinal cord. These preganglionic nerves (shorter) first enter a chain of ganglia located on either side of the spinal cord, called the sympathetic chain ganglia, collectively called the sympathetic trunk. The nerve fibers leaving the ganglia are longer postganglionic nerves.

Hope this helps.